Note 2 - Acquisition of Businesses (Details) (USD $)	3 Months Ended	0 Months Ended	3 Months Ended	1 Months Ended		3 Months Ended	0 Months Ended
	Mar. 29, 2014	Jan. 03, 2014 SymCom, Inc. [Member]	Mar. 29, 2014 SymCom, Inc. [Member]	May 31, 2013 Hamlin, Inc. [Member] Distribution Network, Trademarks and Patents [Member]	May 31, 2013 Hamlin, Inc. [Member]	Mar. 29, 2014 Hamlin, Inc. [Member]	Jan. 03, 2014 Minimum [Member] SymCom, Inc. [Member] Trademarks [Member]	Jan. 03, 2014 Minimum [Member] SymCom, Inc. [Member] Patents [Member]	Jan. 03, 2014 Maximum [Member] SymCom, Inc. [Member] Trademarks [Member]	Jan. 03, 2014 Maximum [Member] SymCom, Inc. [Member] Patents [Member]
Note 2 - Acquisition of Businesses (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%			100.00%
Payments to Acquire Businesses, Net of Cash Acquired	$ 52,000,000	$ 52,000,000
Finite-Lived Intangible Asset, Useful Life				10 years			15 years	16 years	20 years	17 years
Business Acquisition, Inventory Step-up		2,600,000
Non-cash Charges Related to Inventory Step-up			1,400,000
Business Combination, Consideration Transferred					144,400,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual						21,900,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual						$ 300,000